CN205618406U - Impeller subassembly, centrifugal fan and smoke ventilator - Google Patents

Impeller subassembly, centrifugal fan and smoke ventilator Download PDF

Info

Publication number
CN205618406U
CN205618406U CN201620384183.6U CN201620384183U CN205618406U CN 205618406 U CN205618406 U CN 205618406U CN 201620384183 U CN201620384183 U CN 201620384183U CN 205618406 U CN205618406 U CN 205618406U
Authority
CN
China
Prior art keywords
impeller
equal
spiral case
degree
diffusion portion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201620384183.6U
Other languages
Chinese (zh)
Inventor
谭朝辉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Supor Electrical Appliances Manufacturing Co Ltd
Original Assignee
Zhejiang Supor Electrical Appliances Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Supor Electrical Appliances Manufacturing Co Ltd filed Critical Zhejiang Supor Electrical Appliances Manufacturing Co Ltd
Priority to CN201620384183.6U priority Critical patent/CN205618406U/en
Application granted granted Critical
Publication of CN205618406U publication Critical patent/CN205618406U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The utility model provides an impeller subassembly, centrifugal fan and smoke ventilator, wherein, the impeller subassembly includes: the impeller, first diffusion portion, first diffusion portion sets up the one side at the impeller along the axial direction of impeller, second diffusion portion, second diffusion portion sets up the opposite side at the impeller along the axial direction of impeller, and first diffusion portion and second diffusion portion all are horn shaped structure, and the opening sectional area of first diffusion portion and second diffusion portion is all crescent along the direction of keeping away from the impeller, form first diffusion angle beta 1 between the extending direction of first diffusion portion and impeller radial, formation second diffusion angle beta 2 between the extending direction of second diffusion portion and impeller radial, wherein, first diffusion angle beta 1 more than or equal to 30 degree and less than or equal to 45 degree, second diffusion angle beta 2 more than or equal to 30 degree and less than or equal to 50 degree. The utility model provides a smoke ventilator's among the prior art centrifugal fan's the problem that the biggest static pressure is low.

Description

Impeller assembly, centrifugal blower and smoke exhaust ventilator
Technical field
This utility model relates to smoke exhaust ventilator technical field, in particular to a kind of impeller assembly, centrifugal blower and smoke pumping Machine.
Background technology
In existing smoke exhaust ventilator technical field, in order to meet the use demand of high residential building user, the smoking effect of smoke exhaust ventilator In urgent need to be improved.At present, the mode of the smoking effect improving smoke exhaust ventilator generally has two kinds:
A kind of mode is the convulsion amount of the centrifugal blower improving smoke exhaust ventilator, and another way is to increase the centrifugal blower of smoke exhaust ventilator Maximum static pressure.
The technology of the convulsion amount improving centrifugal blower is the most ripe, but while using this kind of mode to improve smoking effect, can not Energy consumption can be increased with avoiding.And use the mode of maximum static pressure increasing centrifugal blower to improve the technology of smoking effect of smoke exhaust ventilator The most immature.
At present, by the way of using direct current generator to replace alternating current generator, the maximum static pressure of centrifugal blower is typically increased, so to carry The rotating speed upper limit of high motor, reaches to increase the effect of centrifugal blower maximum static pressure.But, owing to the energy consumption of direct current generator is relatively big, So that use cost significantly improves, but also the price causing smoke exhaust ventilator is the most prohibitively expensive, adds selling price, Thus had a strong impact on the sales volume of smoke exhaust ventilator.
Therefore, in the installing space of limited smoke exhaust ventilator, ensure that low energy consumption does not increase the use of smoke exhaust ventilator simultaneously On the premise of cost, the technology improving centrifugal blower maximum static pressure by being optimized the structure of centrifugal blower urgently breaks through.
Utility model content
Main purpose of the present utility model is to provide a kind of impeller assembly, centrifugal blower and smoke exhaust ventilator, to solve prior art In the low problem of the maximum static pressure of centrifugal blower of smoke exhaust ventilator.
To achieve these goals, according to an aspect of the present utility model, it is provided that a kind of impeller assembly, impeller assembly includes: Impeller;First diffusion portion, the first diffusion portion is arranged on the side of impeller along the axial direction of impeller;Second diffusion portion, second expands Splenium is arranged on the opposite side of impeller along the axial direction of impeller, the first diffusion portion and the second diffusion portion all in horn-like structure, and The opening section in the first diffusion portion and the second diffusion portion is long-pending to be all gradually increased along the direction away from impeller;The extension side in the first diffusion portion The first diffusion angle beta is formed between the radial direction of impeller1, between bearing of trend and the radial direction of impeller in the second diffusion portion, form the Two diffusion angle betas2, wherein, the first diffusion angle beta1More than or equal to 30 degree and less than or equal to 45 degree, the second diffusion angle beta2Greatly In equal to 30 degree and less than or equal to 50 degree.
Further, the diameter D of the first diffusion periphery away from impeller side in the first diffusion portion1With the second diffusion portion away from leaf The equal diameters of the second diffusion periphery of wheel side.
Further, impeller has the spaced multiple blades of central axis around impeller, each blade away from central axis Distance between first end and central axis is equal, and the number of blade is more than or equal to 60 and less than or equal to 80.
Further, impeller has the spaced multiple blades of central axis around impeller, in central axis is in horizontal plane Time, the first end away from central axis being positioned at a blade at the peak of impeller in multiple blades and close central axis The second end between line projection and horizontal plane in the plane being perpendicular to central axis between angle form blade pitch angle β3, blade lean angle beta3More than or equal to 45 degree and less than or equal to 60 degree, first end away from central axis of blade is being perpendicular to Tangent line G at subpoint in the plane of central axis1Front G with blade2Between formed the outlet that obtuse angle is impeller install Angle beta4, exit installation angle β4More than or equal to 160 degree and less than 180 degree, the second end of the close central axis of blade is being perpendicular to Tangent line H at subpoint in the plane of central axis1Front H with blade2Between formed the import that acute angle is impeller install Angle beta5, stagger angle β5More than or equal to 60 degree and less than 90 degree.
Further, the impeller outer diameter D of impeller2More than or equal to 250 millimeters and less than or equal to 276 millimeters.
Further, the impeller outer diameter D of impeller2It it is 256 millimeters.
According to another aspect of the present utility model, it is provided that a kind of centrifugal blower, including spiral case and impeller assembly, spiral case has sky Chamber, impeller assembly is arranged in the cavity of spiral case, and impeller assembly is above-mentioned impeller assembly, before cavity is by spiral case coaming plate, spiral case Plate and spiral case back plate surround jointly, before the spiral case of the close spiral case that the first diffusion portion of impeller assembly is arranged on the impeller of impeller assembly The side of plate, the second diffusion portion of impeller assembly is arranged on the side of the spiral case back plate of the close spiral case of impeller.
Further, distance W between two intersection points of the molded line of the end of a period cross section of spiral case and spiral case2More than or equal to 365 millimeters and Less than or equal to 395 millimeters.
Further, distance W between two intersection points of the molded line of the end of a period cross section of spiral case and spiral case2It it is 378 millimeters.
Further, spiral case coaming plate has first paragraph, second segment and the 3rd section being connected, and second segment is the snail tongue section of arc surfaced, The arc radius r of snail tongue section is more than or equal to 4.5 millimeters and less than or equal to 15 millimeters.
According to another aspect of the present utility model, it is provided that a kind of smoke exhaust ventilator, including centrifugal blower, centrifugal blower is above-mentioned Centrifugal blower.
Application the technical solution of the utility model, on the premise of the rotating speed of the alternating current generator without changing centrifugal blower, by inciting somebody to action First diffusion angle beta1Between being disposed greater than equal to 30 degree and being less than or equal to 45 degree, simultaneously by the second diffusion angle beta2It is arranged on More than or equal to 30 degree and less than or equal between 50 degree, so that the maximum static pressure of centrifugal blower maintains 408Pa extremely effectively Between 448Pa.So, it is effectively improved the suitability between impeller and spiral case with the first diffusion portion and the second diffusion portion, Improve the assembling convenience of centrifugal blower, the maximum static pressure of centrifugal blower maintains the scope of high value simultaneously, thus effectively Increase the intensity of draft of centrifugal blower, and then reach the purpose of the smoking effect strengthening smoke exhaust ventilator.
Accompanying drawing explanation
The Figure of description of the part constituting the application is used for providing being further appreciated by of the present utility model, of the present utility model Schematic description and description is used for explaining this utility model, is not intended that improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 shows the front view of the spiral case of the centrifugal blower according to a kind of alternative embodiment of the present utility model;
Fig. 2 shows the molded line schematic diagram of the spiral case of the centrifugal blower in Fig. 1;
Fig. 3 shows the right view of the spiral case of the centrifugal blower in Fig. 1;
Fig. 4 show the centrifugal blower according to a kind of alternative embodiment of the present utility model with the first diffusion portion and the second diffusion The structural representation of the impeller in portion;
Fig. 5 shows the top view of the impeller in the alternative embodiment of Fig. 4;
Fig. 6 shows another top view of the impeller in Fig. 4 in alternative embodiment.
Wherein, above-mentioned accompanying drawing includes the following drawings labelling:
10, spiral case;11, spiral case coaming plate;111, first paragraph;112, second segment;113, the 3rd section;12, spiral case header board; 13, spiral case back plate;14, end of a period cross section;15, molded line;151, the first tangent line;152, the second tangent line;16, air outlet; 20, impeller;21, central axis;22, blade;30, the first diffusion portion;31, the first diffusion periphery;40, the second diffusion Portion;41, the second diffusion periphery.
Detailed description of the invention
It should be noted that in the case of not conflicting, the embodiment in the application and the feature in embodiment can be mutually combined. Describe this utility model below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
It it is noted that described further below is all exemplary, it is intended to provide further instruction to the application.Unless otherwise finger Bright, all technology used herein and scientific terminology have and are generally understood that with the application person of an ordinary skill in the technical field Identical meanings.
In this utility model, in the case of illustrating on the contrary, the noun of locality of use such as " upper and lower " is typically for attached For direction shown in figure, or for on vertical, vertical or gravity direction;Similarly, for ease of understand and Describing, it is inside and outside that " inside and outside " refers to relative to the profile of each parts itself, but the above-mentioned noun of locality is not limited to this practicality Novel.
The problem low in order to solve the maximum static pressure of the centrifugal blower of smoke exhaust ventilator of the prior art, this utility model provides one Planting impeller assembly, centrifugal blower and smoke exhaust ventilator, wherein, impeller assembly is following impeller assembly.
As shown in Figure 4, impeller assembly includes impeller the 20, first diffusion portion 30 and the second diffusion portion 40, the first edge, diffusion portion 30 The axial direction of impeller 20 is arranged on the side of impeller 20, and the second diffusion portion 40 is arranged on impeller along the axial direction of impeller 20 The opposite side of 20, the first diffusion portion 30 and the second diffusion portion 40 are all in horn-like structure, and the first diffusion portion 30 and the second diffusion The opening section in portion 40 is long-pending to be all gradually increased along the direction away from impeller 20;The bearing of trend in the first diffusion portion 30 and impeller 20 Radial direction between form the first diffusion angle beta1, between bearing of trend and the radial direction of impeller 20 in the second diffusion portion 40, form second Diffusion angle beta2, wherein, the first diffusion angle beta1More than or equal to 30 degree and less than or equal to 45 degree, the second diffusion angle beta2It is more than Equal to 30 degree and less than or equal to 50 degree.
On the premise of the rotating speed of the alternating current generator without changing centrifugal blower, by by the first diffusion angle beta1It is disposed greater than In 30 degree and less than or equal between 45 degree, simultaneously by the second diffusion angle beta2It is disposed greater than equal to 30 degree and less than or equal to 50 Between degree, so that the maximum static pressure of centrifugal blower maintains between 408Pa to 448Pa effectively.So, it is effectively improved With the suitability between the first diffusion portion 30 and the impeller 20 in the second diffusion portion 40 and spiral case 10, improve centrifugal blower Assembling convenience, the maximum static pressure of centrifugal blower maintains the scope of high value simultaneously, thus effectively increases centrifugal blower The intensity of draft, and then reached to strengthen the purpose of smoking effect of smoke exhaust ventilator.
From substantial amounts of experiment conclusion, when the first diffusion angle beta1Or the second diffusion angle beta2During less than 30 degree, centrifugal blower Maximum static pressure be in lower value all the time, centrifugal blower is in unstable working state, when the first diffusion angle beta1More than 45 degree or Second diffusion angle beta2During more than 50 degree, it is not easy to impeller 20 is successfully installed to spiral case 10, reduces centrifugal blower Practicality.
Alternatively, the first diffusion angle beta1With the second diffusion angle beta2It is 45 degree.First diffusion portion 30 away from impeller 20 The diameter D of the first diffusion periphery 31 of side1With the second diffusion periphery 41 away from impeller 20 side in the second diffusion portion 40 Equal diameters.So, impeller 20 symmetrically structure, it is effectively improved the maximum static pressure of centrifugal blower, but also convenient by leaf Wheel 20 is assemblied in spiral case 10, improves the assembling convenience of centrifugal blower.
Still optionally further, the rotating speed of the alternating current generator of centrifugal blower is 1350 revs/min, the first diffusion portion in horn-like structure 30 a length of 10 millimeters of its bearing of trend, and the second diffusion portion 40 in horn-like structure is at a length of the 10 of its bearing of trend Millimeter.So, while the maximum static pressure ensureing centrifugal blower is in high value, it is effectively improved impeller 20 and spiral case 10 Between suitability is installed, and make the overall dimensions of centrifugal blower be in the range of reasonably.
When the rotating speed of the alternating current generator of centrifugal blower is 1350 revs/min, the first diffusion angle beta1, the second diffusion angle beta2With The relation of the maximum static pressure of centrifugal blower is as shown in table 1 below.
Table 1. first diffusion angle beta1, the second diffusion angle beta2Relation table with the maximum static pressure of centrifugal blower
As seen from the above table, when the first diffusion angle beta1Between being disposed greater than equal to 30 degree and being less than or equal to 45 degree, the second diffusion Angle beta2Time between being disposed greater than equal to 30 degree and being less than or equal to 50 degree, the maximum static pressure of centrifugal blower maintains effectively Between 408Pa to 448Pa, centrifugal blower now is in efficient duty.
As depicted in figs. 1 and 2, the centrifugal blower that this utility model provides includes impeller assembly, motor and spiral case 10, impeller sets Part is arranged in spiral case 10, and motor driven impeller assembly rotates, and spiral case 10 has cavity, and cavity is by spiral case coaming plate 11, spiral case Header board 12 and spiral case back plate 13 surround jointly, and spiral case coaming plate 11 has first paragraph 111, the second segment 112 and the 3rd being connected Section 113, second segment 112 is the snail tongue section of arc surfaced, and the arc radius r of snail tongue section is more than or equal to 4.5 millimeters and less than or equal to 15 Millimeter.The effect of snail tongue section is to prevent gas at spiral case 10 internal circulation flow.
On the premise of the rotating speed of the alternating current generator without changing centrifugal blower, only by improving the structure of spiral case 10, spiral case is enclosed Between the arc radius r of the snail tongue section of plate 11 is disposed greater than equal to 4.5 millimeters and is less than or equal to 15 millimeters, so that centrifugal wind The maximum static pressure of machine maintains between 415Pa to 436.7Pa effectively, is namely effectively increased the maximum static pressure of centrifugal blower.
Alternatively, the rotating speed of the alternating current generator of centrifugal blower is 1350 revs/min.
From substantial amounts of experiment conclusion, the maximum static pressure of centrifugal blower reduces with the increase of the arc radius r of snail tongue section, and works as When the arc radius r of snail tongue section is more than 15 millimeters, the maximum static pressure of centrifugal blower drastically declines, and centrifugal blower is in unstable work Making state, when the arc radius r of snail tongue section is less than 4.5 millimeters, the difficulty of the manufacturing process of the spiral case 10 of centrifugal blower is obvious Increasing, the manufacturing cost of spiral case 10 dramatically increases, and have impact on the economy of centrifugal blower.
It follows that the optimum span of the arc radius r of the snail tongue section of spiral case coaming plate 11 is between 4.5 millimeters and 15 millimeters, Centrifugal blower now is in optimum Working, and the maximum static pressure of centrifugal blower maintains a high value, thus by by snail Between the arc radius r of the snail tongue section of shell coaming plate 11 is disposed greater than equal to 4.5 millimeters and is less than or equal to 15 millimeters, effectively control Make manufacturing cost and the cost of use of smoke exhaust ventilator, reach the purpose of the smoking effect strengthening smoke exhaust ventilator simultaneously.
Alternatively, as it is shown on figure 3, the width W of spiral case 101It it is 175 millimeters.
Alternatively, distance W between two intersection points of the molded line 15 of the end of a period cross section 14 of spiral case 10 and spiral case 102It is more than or equal to 365 millimeters and less than or equal to 395 millimeters.
As depicted in figs. 1 and 2, the first tangent line 151 of the molded line 15 of spiral case 10 and the second tangent line 152 are each parallel to spiral case 10 End of a period cross section 14, and the first tangent line 151 relative to the second tangent line 152 away from the air outlet 16 of spiral case 10, the first tangent line 151 And the point of contact formed at the molded line 15 of spiral case 10 is to distance W between the outlet air surface of the air outlet 16 of spiral case 103It it is 373 millimeters.
By optimizing the width W of spiral case 10 further1Value, the molded line 15 of end of a period cross section 14 and spiral case 10 of spiral case 10 Two intersection points between distance W2Span and the first tangent line 151 and the molded line 15 of spiral case 10 at the point of contact that formed to snail Distance W between the outlet air surface of the air outlet 16 of shell 103Value, so that it is determined that the monnolithic case physical dimension of spiral case 10, Obtain the centrifugal blower that the size of spiral case 10 meets a series of models of above-mentioned scope, and by by the spiral case coaming plate of centrifugal blower The arc radius r of the snail tongue section of 11 is arranged on rational scope, just can improve the maximum static pressure of the centrifugal blower of a series of model, Thus increase the intensity of draft of centrifugal blower, and then reach the purpose of the smoking effect strengthening smoke exhaust ventilator.
Preferably, distance W between two intersection points of the molded line 15 of the end of a period cross section 14 of spiral case 10 and spiral case 102It is 378 millis Rice.So, it is determined that the centrifugal blower of a kind of concrete model, when the rotating speed of the alternating current generator of centrifugal blower is 1350 revs/min, The arc radius r of the snail tongue section of the spiral case coaming plate 11 of centrifugal blower is as shown in table 2 below with the relation of maximum static pressure.
The arc radius r of table 2. snail tongue section and the maximum static pressure relation table of centrifugal blower
Arc radius r (millimeter) 4.5 8 15 20
Maximum static pressure (Pa) 436.7 425 415 389
As shown in Figures 4 to 6, the impeller 20 of impeller assembly has the spaced multiple leaves of central axis 21 around impeller 20 Sheet 22, the distance between the first end away from central axis 21 and the central axis 21 of each blade 22 is equal, blade 22 Number is more than or equal to 60 and less than or equal to 80.So, the maximum static pressure of centrifugal blower maintains 425Pa to 455Pa effectively Between.
On the premise of ensureing that the rotating speed of alternating current generator of centrifugal blower is constant, at identical impeller outer diameter D2With profile ID D3's Under premise, by reasonably the number of blade 22 being arranged between 60 to 80, it is effectively increased the maximum of centrifugal blower Static pressure, thus increase the intensity of draft of centrifugal blower, and then reached the purpose of the smoking effect strengthening smoke exhaust ventilator.
Specifically, when the rotating speed of the alternating current generator of centrifugal blower is 1350 revs/min, impeller outer diameter D2When being 256 millimeters, The quantity of blade 22 is as shown in table 3 below with the relation of the maximum static pressure of centrifugal blower.
The relation table of the maximum static pressure of table 3. blade quantity and centrifugal blower
Lobe numbers (individual) 56 60 66 76 80
Maximum static pressure (Pa) 410.9 416 425 441.8 455
As seen from the above table, along with the increase of the quantity of blade 22, the maximum static pressure of centrifugal blower increases, it is contemplated that centrifugal wind The quantity of the blade 22 of machine too much can cause the macroeconomic of centrifugal blower poor, and the quantity of blade too much can be to centrifugal wind The intensity of draft of machine produces certain impact, when the span of the quantity of the blade 22 of centrifugal blower is between 60 to 80, The maximum static pressure of centrifugal blower, while can producing the good intensity of draft, also significantly reduces centrifugal blower processing and manufacturing Cost, thus reduce the overall price of smoke exhaust ventilator, it is possible to improve the sales volume of smoke exhaust ventilator well.
As shown in Figure 6, when central axis 21 is in horizontal plane, at the peak being positioned at impeller 20 in multiple blades 22 A blade 22 the first end away from central axis 21 and near central axis 21 the second end between line be perpendicular to Angle between projection and horizontal plane in the plane of central axis 21 forms blade lean angle beta3, blade lean angle beta3It is more than In 45 degree and less than or equal to 60 degree.
On the premise of ensureing that the rotating speed of alternating current generator of centrifugal blower is constant, by reasonably by blade lean angle beta3It is arranged on 45 Spend between 60 degree, thus ensure that centrifugal blower has enough maximum static pressures and can produce enough intensity of drafts, Jin Erda Arrive the purpose of the smoking effect strengthening smoke exhaust ventilator.
From experimental data of the present utility model, the maximum static pressure of centrifugal blower is with blade lean angle beta3Reduction and increase, with Time in view of installation difficulty between impeller 20 and spiral case 10, blade lean angle beta3Optimum span at 45 degree to 60 degree Between.
As it is shown in figure 5, impeller 20 has the spaced multiple blades 22 of central axis 21 around impeller 20, blade 22 Away from the tangent line G at the first end of central axis 21 subpoint in the plane being perpendicular to central axis 211Volume with blade 22 Line G2Between formed the exit installation angle β that obtuse angle is impeller 204, exit installation angle β4More than or equal to 160 degree and less than 180 Degree.
Wherein, the front G of blade 222Outward flange camber line for blade 22 prolongs at the straight line of the end away from central axis 21 Long line.
On the premise of ensureing that the rotating speed of alternating current generator of centrifugal blower is constant, by reasonably by exit installation angle β4It is arranged on Between 160 degree to 180 degree, thus ensure that centrifugal blower has enough maximum static pressures and can produce enough intensity of drafts, enter And reached the purpose of the smoking effect strengthening smoke exhaust ventilator.
As it is shown in figure 5, impeller 20 has the spaced multiple blades 22 of central axis 21 around impeller 20, blade 22 Tangent line H at second end of close central axis 21 subpoint in the plane being perpendicular to central axis 211Volume with blade 22 Line H2Between formed the stagger angle β that acute angle is impeller 205, stagger angle β5More than or equal to 60 degree and less than 90 degree.
Wherein, the front H of blade 222For blade 22 outward flange camber line near central axis 21 the second end at straight line Extended line.
On the premise of ensureing that the rotating speed of alternating current generator of centrifugal blower is constant, by reasonably by stagger angle β5It is arranged on 60 Spend between 90 degree, thus ensure that centrifugal blower has enough maximum static pressures and can produce enough intensity of drafts, Jin Erda Arrive the purpose of the smoking effect strengthening smoke exhaust ventilator.
Specifically, when the rotating speed of the alternating current generator of centrifugal blower is 1350 revs/min, impeller outer diameter D2When being 256 millimeters, The blade lean angle beta of impeller 203, exit installation angle β4, stagger angle β5As follows with the relation of the maximum static pressure of centrifugal blower Shown in table 4.
Table 4. blade lean angle beta3, exit installation angle β4, stagger angle β5Relation table with the maximum static pressure of centrifugal blower
Blade lean angle beta3 107 degree 97 degree 77 degree 67 degree 60 degree 49 degree 45 degree
Exit installation angle β4 122 degree 132 degree 152 degree 160 degree 172 degree 180 degree 180 degree
Stagger angle β5 11 degree 23 degree 47 degree 60 degree 70 degree 80 degree 90 degree
Maximum static pressure (Pa) 237 287 361 392 425 472 485
When the rotating speed of the alternating current generator of centrifugal blower is 1350 revs/min, the impeller outer diameter D of impeller 202With centrifugal blower The relation of big static pressure is as shown in table 5 below.
Table 5. impeller outer diameter D2Relation table with the maximum static pressure of centrifugal blower
Impeller outer diameter D2(millimeter) 220 240 250 256 276 280
Maximum static pressure (Pa) 293.5 370 415 425 502 520
As seen from the above table, the maximum static pressure of centrifugal blower is with the impeller outer diameter D of impeller 202Increase and increase, and centrifugal blower Maximum static pressure and impeller outer diameter D2Square be directly proportional.
Alternatively, the impeller outer diameter D of impeller 202More than or equal to 250 millimeters and less than or equal to 276 millimeters.So, impeller is worked as The impeller outer diameter D of 202Optimum span between 250 millimeters to 276 millimeters time, centrifugal blower is in optimum Working, The maximum static pressure of centrifugal blower maintains a high value, thus effectively increases the intensity of draft of centrifugal blower, and then reaches Strengthen the purpose of the smoking effect of smoke exhaust ventilator.
Still optionally further, the impeller outer diameter D of impeller 202It it is 256 millimeters.Impeller outer diameter D when impeller 202It it is 256 millimeters Time, the spiral case 10 of the size adapting to impeller 20 also has the optimal installation dimension with smoke exhaust ventilator, facilitates centrifugal blower and take out Assembling between lampblack absorber, thus while meeting the intensity of draft of centrifugal blower, improve the installation conveniency of smoke exhaust ventilator And practicality.
The maximum static pressure of raising centrifugal blower, to improve the problem that the smoking effect of smoke exhaust ventilator is a system, is using alternating current Machine in the case of ensureing that rotating speed is certain, by increasing the impeller outer diameter D of impeller2Or reduce blade lean angle beta3Can increase significantly The maximum static pressure of big centrifugal blower.Moreover, by reduce centrifugal blower spiral case coaming plate 11 snail tongue section arc radius r or Person increases the quantity of blade 22 or increases the exit installation angle β of impeller 204With stagger angle β5Or the first diffusion angle is set Degree β1With the second diffusion angle beta2Between angular relationship etc., all can play the effect of maximum static pressure increasing centrifugal blower, this Sample, while enhancing the smoking effect of smoke exhaust ventilator, significantly reduces the energy consumption of smoke exhaust ventilator, so that using smoke exhaust ventilator Global design the most reasonable, improve user and to the experience of product and improve product competitiveness in the market.
It should be noted that term used herein above merely to describe detailed description of the invention, and be not intended to restricted root according to this Shen Illustrative embodiments please.As used herein, unless the context clearly indicates otherwise, otherwise singulative is also intended to Including plural form, additionally, it should be understood that, when using term " to comprise " in this manual and/or time " including ", It indicates existing characteristics, step, work, device, assembly and/or combinations thereof.
It should be noted that term " first " in the description and claims of this application and above-mentioned accompanying drawing, " second " etc. It is for distinguishing similar object, without being used for describing specific order or precedence.Should be appreciated that the data of so use Can exchange in the appropriate case, in order to presently filed embodiment described herein can be with except here illustrating or describing Order beyond those is implemented.
The foregoing is only preferred embodiment of the present utility model, be not limited to this utility model, for this area For technical staff, this utility model can have various modifications and variations.All within spirit of the present utility model and principle, institute Any modification, equivalent substitution and improvement etc. made, within should be included in protection domain of the present utility model.

Claims (11)

1. an impeller assembly, it is characterised in that described impeller assembly includes:
Impeller (20);
First diffusion portion (30), described first diffusion portion (30) is arranged on described along the axial direction of described impeller (20) The side of impeller (20);
Second diffusion portion (40), described second diffusion portion (40) is arranged on described along the axial direction of described impeller (20) The opposite side of impeller (20), described first diffusion portion (30) and described second diffusion portion (40) all in horn-like structure, And the opening section in described first diffusion portion (30) and described second diffusion portion (40) is long-pending all along away from described impeller (20) Direction be gradually increased;Formed between bearing of trend and the radial direction of described impeller (20) in described first diffusion portion (30) First diffusion angle beta1, formed between bearing of trend and the radial direction of described impeller (20) in described second diffusion portion (40) Second diffusion angle beta2, wherein, described first diffusion angle beta1More than or equal to 30 degree and less than or equal to 45 degree, described the Two diffusion angle betas2More than or equal to 30 degree and less than or equal to 50 degree.
Impeller assembly the most according to claim 1, it is characterised in that described first diffusion portion (30) away from described impeller (20) the diameter D of the first diffusion periphery (31) of side1With described second diffusion portion (40) away from described impeller (20) The equal diameters of the second diffusion periphery (41) of side.
Impeller assembly the most according to claim 2, it is characterised in that described impeller (20) has around described impeller (20) The spaced multiple blades of central axis (21) (22), each described blade (22) away from described central axis (21) The first end and described central axis (21) between distance equal, the number of described blade (22) be more than or equal to 60 And less than or equal to 80.
Impeller assembly the most according to claim 1, it is characterised in that described impeller (20) has around described impeller (20) The spaced multiple blades of central axis (21) (22), when described central axis (21) is in horizontal plane, A described blade (22) at the peak being positioned at described impeller (20) in multiple described blades (22) away from First end of described central axis (21) and the line between the second end of described central axis (21) are being perpendicular to The angle between projection and described horizontal plane in the plane of described central axis (21) forms blade lean angle beta3, described Blade lean angle beta3More than or equal to 45 degree and less than or equal to 60 degree, described blade (22) away from described central axis (21) First end subpoint in the plane being perpendicular to described central axis (21) at tangent line G1With described blade (22) Front G2Between formed the exit installation angle β that obtuse angle is described impeller (20)4, described exit installation angle β4It is more than Equal to 160 degree and less than 180 degree, the second end of the close described central axis (21) of described blade (22) is vertically Tangent line H at subpoint in the plane of described central axis (21)1Front H with described blade (22)2Between The stagger angle β that acute angle is described impeller (20) formed5, described stagger angle β5More than or equal to 60 degree and little In 90 degree.
Impeller assembly the most according to claim 1, it is characterised in that the impeller outer diameter D of described impeller (20)2It is more than or equal to 250 millimeters and less than or equal to 276 millimeters.
Impeller assembly the most according to claim 5, it is characterised in that the impeller outer diameter D of described impeller (20)2It is 256 millis Rice.
7. a centrifugal blower, including spiral case (10) and impeller assembly, described spiral case (10) has cavity, described impeller assembly It is arranged in the described cavity of described spiral case (10), it is characterised in that described impeller assembly is in claim 1 to 6 Impeller assembly described in any one, described cavity is by spiral case coaming plate (11), spiral case header board (12) and spiral case back plate (13) Jointly surrounding, the first diffusion portion (30) of described impeller assembly is arranged on the close of the impeller (20) of described impeller assembly The side of the spiral case header board (12) of described spiral case (10), the second diffusion portion (40) of described impeller assembly is arranged on institute State the side of the spiral case back plate (13) of the close described spiral case (10) of impeller (20).
Centrifugal blower the most according to claim 7, it is characterised in that the end of a period cross section (14) of described spiral case (10) and institute Distance W between two intersection points of the molded line (15) stating spiral case (10)2More than or equal to 365 millimeters and less than or equal to 395 Millimeter.
Centrifugal blower the most according to claim 8, it is characterised in that the end of a period cross section (14) of described spiral case (10) and institute Distance W between two intersection points of the molded line (15) stating spiral case (10)2It it is 378 millimeters.
Centrifugal blower the most according to claim 9, it is characterised in that described spiral case coaming plate (11) has the first paragraph being connected (111), second segment (112) and the 3rd section (113), described second segment (112) is the snail tongue section of arc surfaced, described snail The arc radius r of tongue section is more than or equal to 4.5 millimeters and less than or equal to 15 millimeters.
11. 1 kinds of smoke exhaust ventilators, including centrifugal blower, it is characterised in that described centrifugal blower is any one of claim 7 to 10 Described centrifugal blower.
CN201620384183.6U 2016-04-29 2016-04-29 Impeller subassembly, centrifugal fan and smoke ventilator Active CN205618406U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620384183.6U CN205618406U (en) 2016-04-29 2016-04-29 Impeller subassembly, centrifugal fan and smoke ventilator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620384183.6U CN205618406U (en) 2016-04-29 2016-04-29 Impeller subassembly, centrifugal fan and smoke ventilator

Publications (1)

Publication Number Publication Date
CN205618406U true CN205618406U (en) 2016-10-05

Family

ID=57025373

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201620384183.6U Active CN205618406U (en) 2016-04-29 2016-04-29 Impeller subassembly, centrifugal fan and smoke ventilator

Country Status (1)

Country Link
CN (1) CN205618406U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109595186A (en) * 2018-12-07 2019-04-09 佛山市南海九洲普惠风机有限公司 A kind of air-foil fan

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109595186A (en) * 2018-12-07 2019-04-09 佛山市南海九洲普惠风机有限公司 A kind of air-foil fan
CN109595186B (en) * 2018-12-07 2023-09-19 佛山市南海九洲普惠风机有限公司 High-efficiency fan

Similar Documents

Publication Publication Date Title
CN110118194B (en) Axial flow wind wheel and air conditioner
CN102032211B (en) Biconical impeller for range hood
CN106438466A (en) Centrifugal fan and air-conditioner indoor unit
WO2021063050A1 (en) Fan and axial-flow impeller
CN105782076A (en) Centrifugal fan and kitchen ventilator
CN205618406U (en) Impeller subassembly, centrifugal fan and smoke ventilator
CN205618407U (en) Impeller subassembly, centrifugal fan and smoke ventilator
CN205618392U (en) Centrifugal fan and smoke ventilator
CN203130602U (en) Cross-flow fan for air conditioner, cross-flow blower and air conditioner
CN203584898U (en) Low-noise high-efficiency central air conditioner outdoor machine cooling axial-flow fan
CN205639069U (en) Movable vane, guiding subassembly and axial compressor cabinet -type air conditioner of axial compressor cabinet -type air conditioner
CN201687736U (en) Cross flow fan and air conditioner with same
CN109595197B (en) Fan
WO2020103519A1 (en) Centrifugal wheel, air conditioner, and assembly method for the centrifugal wheel
CN103629156B (en) A kind of central air conditioner outdoor unit but axial-flow blower of low-noise high-efficiency
CN219865578U (en) Centrifugal fan and air conditioner
CN202679887U (en) Wind-pressure enhanced radiating module
CN201133384Y (en) Cross-flow fan
CN205190328U (en) A machine in centrifugal fan and air conditioning for machine in air conditioning
CN211737550U (en) Backward centrifugal cross-section noise reduction type centrifugal fan blade
CN208997043U (en) Air-inlet grille and fan
CN109595198B (en) Fan impeller
CN202418036U (en) Axial flow fan and air conditioner with same
CN207879691U (en) Axial-flow windwheel and air conditioner
CN219012968U (en) Centrifugal fan blade, centrifugal fan and air conditioner

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant